Large Lithium Soil Anomaly Defined at Ti-Tree Project

Augustus Minerals (ASX: AUG; “Augustus” or the “Company”) is pleased to advise that a review of soil sampling data completed by the company has returned high tenure lithium and rubidium results in and around the Peak Bore prospect area.

• Review of soil sample results have defined numerous highly promising lithium anomalies over a single coherent area at the Peak Bore location
• Numerous lithium results Li2O > 100ppm and the key lithium pegmatite pathfinder element Rubidium > 400ppm
• First pass reconnaissance mapping of the anomaly has identified outcrop of mafic greenstone and Leake Spring Metamorphics rock units which host spodumene pegmatites in the region
• Location to be a key focus during the early portion of the 2024 exploration campaign

The program has confirmed multiple lithium and pathfinder element anomalies within a zone approximately 7km x 6km which sits on and around a geologically complex flexure of the Ti-Tree shear.

Figure 1. Map on left showing distribution of lithium (ppm) results in ultrafine soil samples. Map on right showing distribution of rubidium (ppm) results in ultrafine soil samples.

Samples were collected on north-south oriented lines at a spacing of 100m x 400m.

The vast majority of the 7km by 6km soil anomaly is covered by thin soil cover. Basement rocks contain a mixture of Durlacher and Moorarie granites, as well as doleritic and felsic dykes and sills.

Encouragingly several occurrences of both Leake Spring Metamorphic and mafic greenstone have been found outcropping within parts of the anomaly coincident with higher grade portions of the anomaly.

More importantly, the Thirty-Three Supersuite granites which are presumed to be the source of all spodumene pegmatites in the Gascoyne region are in close proximity, just a few kms to the east, with the Delta Lithium Yinnetharra Lithium deposit 40kms away along strike.

Figure 2. Location of the Peak Bore lithium anomaly in relation regional soil sampling program and the Ti-Tree Shear zone.

Andrew Reid, Managing Director

“This large lithium anomaly continues our strategy for searching for new critical mineral targets in the Gascoyne.

“Results from the soils confirm the presence of lithium and more importantly key pegmatite pathfinder elements, overlaps the Ti-Tree Shear for which Augustus holds 85kms of strike length, and contain the same rocks which host the Yinnetharra Lithium Deposit.

“Our technical team is already working up exploration programs for 2024 and will use this data to redefine our priorities in this area.”

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